An issue was discovered in the Source Integration plugin before 1.5.9 and 2.x before 2.1.5 for MantisBT. A cross-site scripting (XSS) vulnerability in the Manage Repository and Changesets List pages allows execution of arbitrary code (if CSP settings permit it) via repo_manage_page.php or list.php.
https://github.com/mantisbt-plugins/source-integration/releases/tag/v2.1.5
https://github.com/mantisbt-plugins/source-integration/releases/tag/v1.5.9
https://github.com/mantisbt-plugins/source-integration/issues/286